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3 years ago

Renee tossed 12 heads when tossing a coin 18 times.

1 answer:

5 0

So,

Simply divide 12 by 18.
$\frac{12}{18} --\ \textgreater \ \frac{2}{3}$

The experimental probability of tossing heads was 2 out of 3.

You might be interested in

A researcher conducts a hypothesis test using a sample of n = 40 from an unknown population. What is the df value for the t stat

aliya0001 [1]

Answer:

Correct option: b 39.

Step-by-step explanation:

A one-sample (or one mean) t-test is applied to test whether the population-parameter is significantly different from some hypothetical value.

The degrees of freedom of the <em>t</em>-test is:

df = n - 1

It is provided that the sample size is, <em>n</em> = 40.

Compute the degrees of freedom as follows:

df = n - 1

= 40 - 1

= 39

Thus, the correct option is b.

3 0

3 years ago

Of all sixth graders, 70% sent a text message yesterday. Ten trials of a simulation are conducted and the data are recorded belo

Effectus [21]

Answer:

80%

Step-by-step explanation:

According to the given data, the numbers 0 through 6 represent students who sent a text yesterday while the numbers 7 through 9 represent students who did not send a text yesterday.

Based on this key, we will calculate the number of students who sent the text yesterday and the number of students who did not sent the text yesterday.

The given data is: 62072, 34570, 80983, 04292, 83150, 36330, 96268, 14077, 77985, 13511

For each group we will identify how many students sent the text and how many students did not. According to the key, a number from 0 to 6 will be counted as a student who sent the text and a number from 7 to 9 will be counted as a student who did not send the text. Students who did not sent the text are made bold in the groups below.

62072: 4 students sent the text, 1 did not

34570: 4 students sent the text, 1 did not

80983: 2 students sent the text, 3 did not

04292: 4 students sent the text, 1 did not

83150: 4 students sent the text, 1 did not

36330: All 5 students sent the text

96268: 3 students sent the text, 2 did not

14077: 3 students sent the text, 2 did not

77985: 1 student sent the text, 4 did not

13511: All 5 students sent the text

We need to find the probability that 3 or more of a group of 5 students randomly selected will send a text today.

From the given groups, the number of groups where 3 or more students sent a text = 8

This represents our number of favorable or desired outcomes.

Total number of possible outcomes is the total number of groups = 10

Since, probability is defined as the ratio of number of favorable outcomes to total number of outcomes, based on the simulated data the probability that 3 or more of a group of 5 students randomly selected will send a text today will be = $\frac{8}{10}=0.80=80\%$

Thus, based on the simulated data there is 80% probability that 3 or more of a group of 5 students randomly selected will send a text today

5 0

3 years ago

Read 2 more answers

Today only, a table is being sold for $333 . This is 74% of its regular price. What was the price yesterday?

Vinil7 [7]

The table was being sold at $450 yesterday

5 0

3 years ago

Please help please please

Natalka [10]

<h2><u>Answer:</u></h2>

'?' is <u>88°.</u>

<h2><u>Step-by-step explanation:</u></h2>

First, we work out the final angle of the left triangle, which has a total of 180°. To do this we take 40° and 66° from 180°, giving us <u>72°</u>
Because there is a straight line along the bottom (which will total 180°), we take both 72° and 56° from 180°, giving us <u>52°</u>, which is the bottom left angle of the right triangle.
Finally, to work out '?', we take 52° and 40° from 180° to get our final answer of <u>88°.</u>

5 0

2 years ago

Which equation could have been used to create this table?

shepuryov [24]

Answer:

Y=2x

Step-by-step explanation:

This is what created the table because if you put in the x and solve the equation it will be the y.

2=2*1

6=2*3

8=2*4

10=2*5

20=2*10

3 0

3 years ago